Samsung U28E850R power supply ( p6514_fsm) driver IC

[proditaki]

I have for mentioned Samsung Monitor which is showing no signs of life

Upon inspection of the power board it looks like the mosfets gave up which took out the resistor, like expected, but unfortunately also the driver IC.

The ic is, unfortunately, beyond recognition.
I was wondering if someone can inform me which ic goes here.
See attached images.

[R_J]

In a case like this the first thing I would do is look in the unit to see if the ic top is somewhere, even a partial number might help. What are the numbers on the mosfets? maybe a similar schematic can be found.
I suspect it is a S3310A even the 9 of the date code looks similar

[proditaki]

Thanks for the reply.
I've looked but can't find (part) of the cap anywhere. (found the top of the burned resistor, but that's it.)

Someone suggested it might be a S3311 and you could swap that with a NCP1200D60R2G.
But that was based of samsung regularly using the S3311 in other devices, not any experience with this particular power supply board.

The mosfet is a 60s360p7.

If i can't get the power supply to work at all i might convert it to use an external 14v power brick, which aren't too expensive.

[R_J]

The bn44-00605a circuit is very similar in that area (component values different) What is left of the ic does seem to suggest a S3310 (you can see part of the last digit 0)
I didn't look close enough at the picture for the mosfet number, now that I did I see what looks like a small burn mark above the C in QM801CS, I would check that CM801 is not bad, either shorted or it may just be cracked, they do like to short and should be replaced with a 2kv type, not the usual 1kv.

It looks like something shorted to QM801CS drain pin on the top photo

[proditaki]

Oh yeah the mosfets QM801CS is shorted completely. Thats the 60s360p7. I already removed that from the board

The mosfet is probably the first thing that failed.

[proditaki]

I'll check cm801 as well thanks.
I ordered replacements for the broken parts.

The cap i should have. Otherwise i can source it at the local electronics shop

[R_J]

I would also replace CM806, the cap on the vcc line of the ic, they usually go bad as the power supply is always on.

[proditaki]

I would also replace CM806, the cap on the vcc line of the ic, they usually go bad as the power supply is always on.

Thanks, will do

[proditaki]

Turns out it wasnt the right driver ic.
I'm not gonna spend much more time on this. I'm converting it to use external power.

Printed an adapter plate and added a jack.